dz asp.net论坛中函数--根据Url获得源文件内容

using System.Net; 
using System.IO;

/// <summary> 
/// 根据Url获得源文件内容 
/// </summary> 
/// <param name="url">合法的Url地址</param> 
/// <returns></returns> 
public static string GetSourceTextByUrl(string url) 
{ 
WebRequest request = WebRequest.Create(url); 
request.Timeout = 20000;//20秒超时 
WebResponse response = request.GetResponse(); 

Stream resStream = response.GetResponseStream(); 
StreamReader sr = new StreamReader(resStream); 
return sr.ReadToEnd(); 
}